Need help with middle to end game!

[Henry the Fifth]

Please only post to this if you have completed several full campaigns with different factions at different levels. Other than the English campaign on easy that I originally did to unlock the factions, I am having trouble finishing the campaigns of other factions especially at harder levels. I am running into money problems in the middle and can only field usually one full stack army at a time in order to conquer territory. By the time I get enough money in the late game to wield two and three full armies I don't have enough time to take a city, negotiate papal politics and build garrisons so that I can keep the armies moving along to finish up at turn 226.
Advice Please!

[TevashSzat]

Remember to properly develop all of your cities and turn any castles that are not necessary into cities for the economy. Try to not enter war with everyone at once since your trade will just plummet. Also, try to garrison all of your cities with the free upkeep units. Disband any mercenaries that are not being used due to their high upkeep, and in general try to sack every city you conquer since relatively little population is killed while you get a large chunk of money

[The Spartan (Returns)]

develop, trade, conquer neighboring rebel states as fast as you can disband unneeded troops, sack, btw, im sure you can manage with 2 armies and the third 1/2. and what faction are you having trouble with?

[Henry the Fifth]

For the most part I'm following this advice all though I may be able to tweak it better. As to factions I have tried them all and have tried to plat to completeion at least six of them, including France, Poland, Milan, Egypt and the Moors!

[sapi]

You could also use my strategy of building up huge armies at the start and allowing yourself to go into debt.

Sack cities and immediately use the proceeds to start critical building projects and recruit mercs.

It doesn't matter if you go into the red if you're the strongest nation militariarly, as you'll eventually turn a profit.

[kublikhan3]

Sack every city you come across. Empty your garrisons and turn them into sacking machines. No sense having valuable income generators sitting around in your castles waiting to get attacked. Stop building those 4k-10k buildings unless you REALLY need them. Your money troubles soon turn into a gold bonanza.